I can copy paste from everywhere except from Jmeter. I am using 10.7.5 OSx Lion and Jmeter version is 2.9 r14
You can try to use cmd + c to copy from other applications and use control + v to paste to jmeter on masOS
Which Look N Feel are you using:
cross platform
Or System
See:
If using Cross Plaform switch to System.
If you're looking to learn jmeter correctly, this book will help you.
Very strange.
But Ctrl+c to copy and Command+v to paste worked for me.